Pump-head.



G.S.KURTZ;

PUMP HEAD.

APPLICATION FILED SEPT. 12. 19l6.

Patented Apr. 17, 1917;

4 2 SHEETS-SHEET! v e El Witnesse 672% Inventor Attorneys Witnesses I I7e by C. S. KURT Z.

PUMP HEAD.

APPLICATION FILED SEPT. 12. 1916 Patented Apr. 17, 1917. 2 SHEETSSHEET2.

Inventor Attorneys 'CHR-ISTIAN s. mm, or EPHRA'IA, rnNNsYLvANIA.

PUMP-HEAD. p I

Specification of Letters Patent.

Patented Apr. 17, 1917.

Application filed September 12,1916. Serial No. 119,683.

To all whom it may concern: I

Be it known that I, GHRIs'rI N S. Konrz, a citizen of the United States,residing at Ephrata, in the county of Lancaster and State ofPennsylvania, have invented a new and useful Pump-Head, of which the following is a specification.

The object of the invention isto provide a simple, efficient andpowerful pump lift having its parts so related as to insure smoothnessof operation with the minimum expenditure of driving energy, and whereinside or crank motion is eliminated, provision being made for varying thelength of the stroke to suit'the condition of operation.

With the foregoing and further objects in view which will appear as thedescription proceeds, the invention resides in the combination andarrangement of parts and in the details of construction hereinafterdescribed and claimed,' it being understood that changes in the precise,embodiment of the invention herein described can be made within thescope of what is claimed without departing from the spirit of theinvention.

In the drawings Figure'l is a side view of a pumphead constructed inaccordance with the invention.

Fig. 2 is an edge view of the same.

Fig. 3 is a detail view partly in section of one of the eccentric gearsand a portion of the bridle.

Fig. 4: is a detail transverse sectional view of a portion of one of theeccentric gears showing the bridle seated therein.

The lift embodying the invention consists essentially of a drive shaft10 mounted in hearings in a suitable supporting frame 11 and adapted tobe operated either manually or by other suitable power, said frame beingcarried by a sleeve or collar 12 adapted for engagement with the welltubing or other suitable support; an eccentric gear 13 carried. by saiddrive shaft-and meshing with a similar eccentric gear 14. having itsspindle 15 mounted in a slide consisting of members 16 mounted toreciprocate upon a guide 17 rising from said frame; and a lift rod 18adapted to be attached at its lower end to a pump rod and beingbifurcated to form a yoke 19 of which the arms are connected at theirextremities with the spindle of the upper eccentric gear or the slideactuated ere y.

In the construction illustrated, the guide 17 is of looped form, withits arms bolted or otherwise rigidly secured to the side members of thesupporting frame, the drive shaft being mounted in bearings offsetlaterally from the vertical plane of the guide whereby the lift rod,operating in the plane of the guide and controlled in its movement bythe slide, operates in a true vertical plane to dispense with sidemotion or deflection of said lift rod, and hence of the pump rod towhich it may be attached. The members of the slide consist of sleevesengaging the arms of the looped guide and are provided with inwardlyextending bearings 20 for the reception of the extremities of thespindle 15 of theupper eccentric gear. Moreover said gear may beprovided with a plurality of spindle seats 21 arranged at differentdistances from the center of the gear to provide for varying theeccentricity of the gear, and hence the throw of the lift rod.

, The lower or driving gear may similarly be provided with a pluralityof seats 22, and to minimize the wear upon the eyes 23 on theextremities of the arms of the yoke 19, a set screw 24: may be providedto hold the spindle 15 stationary with reference to the slide. Obviouslythe driving gear 13 must be locked to the drive shaft, and for thispurpose a set screw 25 is employed.

To prevent accidental relative displacement of the gears, a bridle 26 isextended around them and has pins 27 engaged with peripheral seats 28 inthe gears.

Having thus described the invention, what is claimed is: 1. In a pumplift, the combination with a drive shaft of intermeshing eccentricgears, one of which is operated by said drive shaft, a guide, a slidemounted upon said guide and having the other of said gears mountedtherein, means carried by the gears for adjusting the eccentricity ofsaid gears, and a lift rod connected withthe slide.

2. In a pump lift, the combination with a drive shaft of intermeshingeccentric gears, one of which is operated by said shaft, a guide, aslide mounted upon the guide and having the other of said gears mountedthereon, a bridle encircling said gears and seated thereon, and a liftrod connected with said slide.

3. In a pump lift, the combination w1th a drive shaft of intermeshingeccentri gears,

a guide, a slide mounted upon the gnide, one In testimony that I claimthe foregoing as of said gears being secured to the drlve shaft my own,I have hereto affixed my signature and the other being mounted on saidslide, in the presence of two Witnesses.

said gears being provided with continuous CHRISTIAN S. KURTZ. peripheralseats, a bridle encircling said Witnesses:

gears, and fitted in the seats thereof, and a ANNIE Germ,

lift rod connected with the slide. JOHN W. GEHR.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

